(19)
(11) EP 0 977 179 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.02.2002 Bulletin 2002/06

(43) Date of publication A2:
02.02.2000 Bulletin 2000/05

(21) Application number: 99112611.1

(22) Date of filing: 01.07.1999
(51) International Patent Classification (IPC)7: G11B 5/31
// G11B5/39
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 01.07.1998 JP 18591598

(71) Applicant: Hitachi, Ltd.
Chiyoda-ku, Tokyo 101-8010 (JP)

(72) Inventors:
  • Narumi, Shun-ichi
    Odawara-shi, Kanagawa-ken (JP)
  • Fukui, Hiroshi
    Hitachi-shi (JP)
  • Fuyama, Moriaki
    Hitachi-shi (JP)
  • Komuro, Matahiro
    Hitachi-shi (JP)

(74) Representative: Strehl Schübel-Hopf & Partner 
Maximilianstrasse 54
80538 München
80538 München (DE)

   


(54) Thin-film magnetic head


(57) An inductive thin-film magnetic head with small fluctuations of the reproduction output and noises for reproduction is disclosed. The forward end of each of a lower magnetic core (1, 184) and an upper magnetic core (2, 185) has the same width as the track. The rear end of each of the lower magnetic core and the upper magnetic core, on the other hand, is wider than the forward end thereof in the direction transverse of the track. Also, the lower magnetic core is formed of at least two magnetic layers with a non-magnetic layer (4) interposed therebetween.






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